Vaporizer for internal combustion engines



0. BAUMGARTNER VAPORIZER FOR INTERNAL COMBUSTION ENGINES May 12, 1931 Filed Jan. 25, 1930 Patented May 12, 1931 NHTE STATES FFE'CE PAT VAIPOBIZER FOR INTERNAL CO'MBUSTIGN ENGINES Application filed January 23,

The subject of the present invention is an improvement relating to a vaporizer of hydrocarbons for internal combustion engines.

The vaporizer according to the present invention is of the kind operating without the usual nozzles and where the first mixture of air and fuel is obtained in passages branched off from the float chamber and communicating with lateral air inlets, the ends of which are fan-shaped and open into a second miX- ing chamber provided with arotary sleevesha-ped valve member.

The particular feature of the present invention consists in that the converging passages for forming the first mixture open into a primary vaporizing chamber with which communicate, besides a controllable fuel passage provided with an additional air inlet, also two controllable air inlets, and only 539 one single passage having a cell-shaped end leads the vaporized mixture into the second mixing chamber.

The annexed drawing represents one wor ing example of the vaporizer according to the present invention, wherein A Fig. 1 is an end view of the vaporizer seen from the side of the actuating lever for the valve member,

Fig. 2 is atop view,

so Fig. 3 is a vertical section on line III-III of Fig. 2 or on line IIIIII in Fig. 4 and Fig. l is a vertical longitudinal section on line IV-IV in Fig. 3.

The vaporizer illustrated has a fuel cham- 5 her 1 with a float 2 fed through the neck 3 and the passage 4. This chamber communicates through a passage 5 with a primary vaporizing chamber 6 into which open from the above two air inlets 7 communicating 49 with the atmospheric air through the WlI1 dows 8. Said air inlets may be controlled by means of two lateral needle-screws 9. From said preliminary vaporizing chamber 6 one single vertical passage 10 ending into a cell-shaped slit 11 leads into the second mixing chamber 12 provided with a sleevelike valve member 14 operated by means of an arm 13. By this device the free cross section of the slit 11 may be regulated. Also the fuel passage 5 is made adjustable by 1930, Serial No. 422,934, and in Switzerland December 16, 1929.

means of a needle-screw 15 arranged at an acute angle with the passage 5. This needlescrew is hollow so that atmospheric air may be admitted to the fuel passage through a lateral outlet 16. A second controlling screw 17 of the fuel passage 10 is arranged at a right angle above the mixing chamber 6.

With a view of facilitating the manufacture and the inspection of this vaporizer the casing 18 is divided into two sections at 19 and the tight joint between the two sections is assured by means of two studs 20 which run across the lower section and are provided at their threaded ends with the nuts 21. By this contrivance the primary mixing chamber 6 and the two seats of the needle-screws 9 are made accessible to inspection.

The working of the vaporizer is as follows:

At the beginning of operations when the vaporizer is inits position of running idle the valve is very little open and fuel will be admitted through the passages 5, 1O controlled by the screws 15 and 17 and interrupted by the primary mining or vaporizing chamber 6. At the same time the atmospheric air will flow through the windows 8 and the passages 7 into the chamber 6 and will counteract more or less depending on the adjustment of the screws 15, 17 the admission of the fuel. This fact will create eddies and cause a primary vaporizing. If the valve member 14 is now fully opened only fuel alone on account of its heavier weight than air and on account of the increased draught will get aspired so that the chamber 6 will get filled with fuel and no more air will be admitted through the passages 7, but the fuel collected between the two screws 15, 17 will enter into the second chamber 12 and will enrich the mixture in this chamber and prevent any back-fires and the like. For the further operating of the engine that is in order to accelerate it steadily the screw 15 comes to work. This screw hinders the too fast admission of fuel and the air introduced by this screw will produce again a primary vaporizing of the fuel. By the peculiar arrangement of this vaporizer it will also be possible at full load of the engine and at slow speed to give full charge to the vaporizer without any risk of back-fires. This is proved beyond doubt by practical working and test and must be attributed to the tortuous path which the fire would have to travel and which is barred everywhere at least partly by the valve members.

What I claim as new is In a nozzleless vaporizer of hydrocarbons for internal combustion engines and in combination, a two-part casing, studs with nuts for joining said parts tightly, a float cha1nber and a first vaporizing and mixing chamber, both in the lower part of the casing, and a fuel passage connecting the two chambers, a needle-screw arranged at an acute angle to said fuel passage and adapted to control the same, and an axial air inlet in said screw havmg an opening into the fuel passage two 'window-shaped air inlets in the upper part of the casing, and two air passages connecting 1 the same to the first vaporizing chamber, needle-screwsadapted to control said. air passages, a second mixing and vaporizing chamber in the upper part of the casing, and a rotary sleeve-llke valve member fitted into said second mixing chamber, and a fuel passage arranged between the two air passages and connectingthefirst with the second vaporizing chamber, and cell-shaped slits constituting the openings ofsaid fuel passage into the second vaporizing chamber.

In testimony whereof I have afiixed my OTTO BAUMGARTNER.

. signature. 

